Ernst A. Sonnemann (April 29, 1858 – November 15, 1927) was an American politician and was in the fishing business.
Born in Germany, Sonnemann emigrated with his parents to the United States in 1858 and settled in Sheboygan, Wisconsin.
Sonnemann served on the Sheboygan Common Council and was a Republican.
Sonnemann died in Chicago, Illinois after a short illness.
This article about a Republican Party member of the Wisconsin State Assembly born in the 1850s is a stub.